Qstatin
Based on 1 Customer Validation
QStatin is a potent and selective inhibitor of SmcR (V. harveyi LuxR homologue) with an EC50 of 208.9 nM, binding tightly to SmcR and changes the flexibility of the protein, thereby altering its transcription regulatory activity. QStatin shows pan-QS (Vibrio quorum sensing) inhibitor activity in diverse Vibrio species and attenuates their virulence in an aquatic host. QStatin may be a sustainable antivibriosis agent useful in aquacultures.
For research use only. We do not sell to patients.
- Purity: 98.0%
- CAS No.: 902688-24-8
- Formula: C7H5BrN2O2S2
- Molecular Weight:293.16
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Storage:
4°C, protect from light
* In solvent : -80°C, 6 months; -20°C, 1 month (protect from light)
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Biological Activity
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Chemical Information
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Solvent & Solubility
- Purity & Documentation
- References
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Help & FAQs
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Anti-Infection Compound Library
HY-L002
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Antibacterial Compound Library
HY-L049
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Highly Selective Inhibitors Library
HY-L158
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Bioactive Compound Library Max
HY-L181
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MCE Bioactive Compound Library
HY-L001V
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Bioactive Compound Library
HY-L001
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Protein Kinase Compound Library
HY-L196
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High-Throughput Bioactive Compound Library
HY-L205
Biological Activity
QStatin (0.001 μM-10 μM; 5 hours) inhibits SmcR activity measured by the RLU level for V. vulnificusWT (pBB1), reveals EC50 of 208.9 nM[1]. QStatin (5 μM-50 μM; 16 hours) reduces the activities of SmcR-activated virulence factors (protease and elastase) in V. vulnificus in a dose dependent manner[1]. QStatin (5 μM-50 μM; 16 hours) has no effect on the cellular levels of SmcR, indicating that QStatin does not affect the expression or stability of SmcR[1].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Chemical Information
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CAS No. 902688-24-8
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Appearance Solid
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Molecular Weight 293.16
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Formula C7H5BrN2O2S2
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Color White to off-white
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SMILES
O=S(N1N=CC=C1)(C2=CC=C(Br)S2)=O
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
4°C, protect from light
* In solvent : -80°C, 6 months; -20°C, 1 month (protect from light)
Solvent & Solubility
DMSO : 83.33 mg/mL (284.25 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
Select the appropriate dissolution method based on your experimental animal and administration route.
- For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
- To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for In Vivo experiments, it is recommended to prepare freshly and use it on the same day.
- The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.
Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 2.08 mg/mL (7.10 mM); Clear solution
This protocol yields a clear solution of ≥ 2.08 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.
Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
Add each solvent one by one: 10% DMSO 90% (20% SBE-β-CD in Saline)
Solubility: ≥ 2.08 mg/mL (7.10 mM); Clear solution
This protocol yields a clear solution of ≥ 2.08 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
Please enter the basic information of animal experiments:
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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
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%DMSO +
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
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%+
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+%Tween-80 + +
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%Saline +
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Working solution concentration: 0.22 mg/mL
Method for preparing stock solution: mg drug dissolved in μL DMSO. Stock solution concentration: mg/mL. * In solvent : -80°C, 6 months; -20°C, 1 month (protect from light)
1. Take μL DMSO stock solution;
2. Add μL .
μL , mix evenly;
3. Then add μL Tween 80, mix evenly;
4. Then add μL
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Purity & Documentation
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Data Sheet (274 KB)
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SDS (393 KB)
- English - EN (393 KB)
- Français - FR (393 KB)
- Deutsch - DE (393 KB)
- Norwegian - NO (393 KB)
- Español - ES (393 KB)
- Swedish - SV (393 KB)
- Italian - IT (393 KB)
- Korean - KR (393 KB)
- Portuguese - PT (393 KB)
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Handling Instructions (2659 KB)
References
Complete Stock Solution Preparation Table
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
| Optional Solvent | Concentration Solvent Mass | 1 mg | 5 mg | 10 mg | 25 mg |
|---|---|---|---|---|---|
| DMSO | 1 mM | 3.4111 mL | 17.0555 mL | 34.1111 mL | 85.2777 mL |
| 5 mM | 0.6822 mL | 3.4111 mL | 6.8222 mL | 17.0555 mL | |
| 10 mM | 0.3411 mL | 1.7056 mL | 3.4111 mL | 8.5278 mL | |
| 15 mM | 0.2274 mL | 1.1370 mL | 2.2741 mL | 5.6852 mL | |
| 20 mM | 0.1706 mL | 0.8528 mL | 1.7056 mL | 4.2639 mL | |
| 25 mM | 0.1364 mL | 0.6822 mL | 1.3644 mL | 3.4111 mL | |
| 30 mM | 0.1137 mL | 0.5685 mL | 1.1370 mL | 2.8426 mL | |
| 40 mM | 0.0853 mL | 0.4264 mL | 0.8528 mL | 2.1319 mL | |
| 50 mM | 0.0682 mL | 0.3411 mL | 0.6822 mL | 1.7056 mL | |
| 60 mM | 0.0569 mL | 0.2843 mL | 0.5685 mL | 1.4213 mL | |
| 80 mM | 0.0426 mL | 0.2132 mL | 0.4264 mL | 1.0660 mL | |
| 100 mM | 0.0341 mL | 0.1706 mL | 0.3411 mL | 0.8528 mL |
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